Alloys vs. Elements: Corrosion Resistance in the Real World


Discover which metals and alloys resist corrosion best in our detailed study using saltwater as an electrolyte. Perfect for science enthusiasts!



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Alloys vs Elements Corrosion Resistance in the Real World

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Explore through 34 detailed slides that bring the science of corrosion to life. Each slide is crafted to engage high school learners, simplifying complex concepts into manageable, clear explanations. You’ll discover how common metals like aluminium, iron, and copper react when exposed to corrosive environments like saltwater, and how alloys such as stainless steel and brass compare.

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Additional information

Corrosion Rate of Different Metals and Alloys

Aim: To compare the corrosion rates of a variety of metals and alloys
Equipment: Electrolyte
Salt water (5% w/v)
Test materials
Metal strips: aluminium, iron, zinc, copper.
Alloy strips: stainless steel, brass


Ensure that all metals and alloys are clean and free of corrosion
Place each metal or alloy flat in a Petri dish with the salt water so they are partially immersed.
Observe and record any changes to the surfaces of each material each lesson for several weeks.

Important Notes

If possible it would be appropriate to use seawater as the electrolyte for this experiment.
This is a long-term experiment, most of the metals will not corrode very quickly and differences will be difficult to observe.
Place the metals in the electrolyte so that they are only partially submerged.
Choose iron of various types (cast iron, pigiron, and wrought iron) and a variety of steels.
Ensure that the nonexperimental variables are constant and make observations regularly.